Oil-well pump



Nov. 16 1926.

R. B. THURSTON ET AL OIL WELL VPUMP original Filed March 18. 1925 ATTORNEYS WITNESSES PatentedNov. 16, 1226.

UNHTE mais OIL-WELL IlUMP.

Application filed March 1S, 1925,'Serial The present invention aims to provide an 'oil well `pump which is so constltuted and operated as to reduce to a minimum the labors expended and the time consumed 1n installing and removing the pump, which re-` duces friction to a minimum, which prevents sanding up of the pump, which eliminates the highly undesirable scouring of the plunger bythe action of sand under pressure, which costs ,less to manufacture, in- I stall and actuate and which will etliciently pump oil at a greater depth than pumps now in use and which protects the plunger I from injury or damage during the introduction of the pump assembly into the well.

y Other objects and advantages reside in certain novel features of the construction, arrangement land combination of parts which-willhe hereinafter more fully described andparticularly pointed out in the appended claims, reference being had to the accompan ing draw-ings forming a part of .this speci cation, and in which Figure 1 is a view partly in section and partly in elevation showing an oil well pump constructed in accordance kwith the present invention,

Fi re 2 is a view in vertical section of the e ement shown in Figure 1,

Figure 3 is an enlarged fragmentary sec:

- tional view-showing the manner in which the extension jacket isorganized withthel working/ barrel, and v the4 body -4 is provided with avalve seat 5 vwith which a ball valve 6 co-acts. The ball valve 6 yoperates in a cage 7 which has the form of4 a sleeve and the upward movementy Vof the valve 6'is limited by a cross pin 8.

lThe'sleeve 7 iscoupled by means of a connection 9with the lower end of a stationary plunger-1,10, the plunger 10 being of tubular form and extending verticallyup through the tubing ,1.

ing valve body l4 is fitted in the shoe 2. The upper end of No. 16,444. Renewed February 10,1926.

Avreciprocable working barrel, designated generally at 11; co-operates with the stationary plunger 10. The working barrel includes a jacket 12 and a' liner. 13 andlat the lower end a lower jacket nut 14 is provided.` To the upper end of the jacket and liner a. jacket extension 14 is connected by means of an adapter 15. presentsv a shoulder 16 Withinthe jacket extension 14 and with this shoulder 16 the flange 17 of a pull nut 18 is designed to coact,'thev pull `n ut 18 being threadedly connected with the upper end of the tubular plunger 10. A connection 20v couples the upper end of the extension jacket 14 with a traveling valve cage 21 in which a ball valve 22 is arranged, the .ball valve 22 co-acting with r a seat ofI conventional construction. i

As shown in Fig. -theliner 13 is held in place in the jacket 12 by the nut 14 and The adapter 15` by the adapter 15, the nut 14 and the adapter' form lwit the ends of. the liner v13, such joints being designated at 14a and 15, respectvely. The proper adjustment having been hadin the liner andjacket assembly is maintained by setting or screwing` up the lock nut 25 provided on the adapter 15.*.

In operation, when the sucker rods are re- 15 havin ground joints of frusto-conical ciprocated the working barrel l11 and extension gasket14 movesjupand down and the plunger remainsstationary. The weight of the oil and the ress'ure of the oil holding the valve bodyv 4 own within the shoe 2. 0n the upstroke ofv the Working barrel ,oil is 'drawn 'in through the valvebod 4 and past` the valve Sand ills up the'hol ow plunger 10 and the jacket extension. "Then on. the down stroke of the working barrel the oil is expelled upwardthrough the cage 21. In .the space between thegworking barrel and the tubing such a violent agitation is con-v tinuously set up that the' sand cannot settle during the operation vof the pump and when the pump'is idle andthe working barrel has descended as far as it may this space is pracltically filled up. As there are no obstructions between the upper and lower valves, and as there 1s no sand under pressure between the liner and the plunger and as the valve seats may be and arelarger, than those used-in other pumps of thesamesizethe,l

Huid hasa greater escapementl area `and moves more freely and .consequently thejrods 'drop free. As theret 1s sufficient clearance y between the travelingv parts and tubing, sand is prevented from packing between the traveling vparts andy the stationary `.pzrts by the action of agitation. vThere is no scouring of the plunger by sand since sand under pressure may not contact with the plunger. The pump costs less to manufacture, install and operate and will pump oil from a greater depth than is possible for pumps now in use. There is a substantial reduction-infriction as the` plunger does not liftthe Huid, such a tight lit as is ordinarily yrequired is not nec-j4 essary.

Less time is consumed and less labor is eX- pended in installing and removing the pump since the ltubing does not have to be removed. All that is necessary to do to remove the pump is to lift up the sucker rod since this action will raise the Working barrel and also the plunger, the plunger being lifted by the workin barrel by virtue of the engagement of the ange 17 with the shoulderlG. When the plunger is being'introduced into the well the plunger 10 is housed and protected in the Working barrel and in the extension jacket.

Vie claim:

1. ln an oil well pump, the combination with a tubing having a standing valve shoe, a standing valve body fitted in the shoe, a tubular plunger connected With the standing valvebody, the standing valve body beingheld in line with a reciprocable Working barrel co-operable with said plunger andcomprised of a jacket and liner 'or liners, an extension jacket, and an adapter connect-ing lthe extension jacket and the jacket ofthe Working barrel.

2. In an 011 Well pump, the combination with a tubing'havinff a standing valve shoe, a standing valve bo y fitted in the shoe, a tubular plunger connected With the standing valve body, the standing valve body being held in line with a reciprocable Working barrel co-,operable with said plunger and coinprising a jacket and liner or liners, an extension jacket, an adapter connectingthe ex- 'tension jacket and the jacket of the `working barrel, said adapter providing a shoulder, and a nut engaged with the plunger and co4 opera-ble with the shoulder whereby the plunger and standing -valve may be liftedI from the Well when the Working barrel is lifted therefrom.

3. In an oil Well pump, the combination with a tubing having a standing valve shoe, a standing valve body fitted in the shoe, a tubular plunger connected with the standing valve body, the standing valve body being held in a line with a reciprocable working barrel co-operable with said plunger and comprising a jacket and liner or liners, an extension jacket, an adapter connecting the extension jacket and the jacket of the Working barrel, a lock nut co-opera-ble with the lower end of the extension jacket' and the Working barrel, there being a ground joint between the ends of the liner and the plunger nutand ada ter.

BERT B. THURSTGN. CHARLES Bo THURSTON. 

